Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing metal organic framework film and composite film

A metal-organic framework and composite thin film technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of complex preparation methods, small film size, low universality, etc., and achieve simple preparation process Convenience, controllable thickness, uniform and dense effect inside

Active Publication Date: 2022-03-29
NANJING UNIV OF TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Including secondary growth method, electrochemical in-situ growth, layer-by-layer self-assembly and chemical vapor deposition method, etc., the innovation of these methods has improved the film formation level of MOFs, but it also faces complex preparation methods and small film sizes. low universality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing metal organic framework film and composite film
  • Method for preparing metal organic framework film and composite film
  • Method for preparing metal organic framework film and composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: ZIF-8 film is prepared by polymerization inhibition method

[0039] Weigh 0.186g of zinc nitrate hexahydrate and ultrasonically disperse in 5mL of anhydrous methanol, and set aside;

[0040] Weigh 0.103g of dimethylimidazole and ultrasonically disperse in 5mL of anhydrous methanol, and add 86μL of triethylamine with a pipette gun as a polymerization inhibitor;

[0041] After mixing the above solutions, stir and react at room temperature for ten minutes;

[0042] The obtained precursor solution was then separated with a centrifuge at a speed of 8000 rpm for 3 minutes, and then dispersed in an ethanol solution to obtain a prepolymer colloidal solution;

[0043] The colloidal solution can be formed into a film by spin coating;

[0044] in, figure 2 It is the SEM picture (A) and light transmittance and optical picture (B) of ZIF-8 film.

Embodiment 2

[0045] Example 2: Preparation of HKUST-1 film by polymerization inhibition method

[0046] Weigh 0.64g of copper nitrate trihydrate and ultrasonically disperse in 30mL of anhydrous methanol, set aside;

[0047] Weigh 0.32 g of trimesic acid and ultrasonically disperse in 30 mL of anhydrous methanol, and add 258 μL of triethylamine with a pipette gun as a polymerization inhibitor;

[0048] After mixing the above solutions, stir and react at room temperature for ten minutes;

[0049] The obtained precursor solution was then separated with a centrifuge at a speed of 8000 rpm for 3 minutes, and then dispersed in an ethanol solution to obtain a prepolymer colloidal solution;

[0050] The colloidal solution can form a film by drip coating;

[0051] in, image 3 SEM photo (A) and optical photo (B) of HKUST-1 film.

Embodiment 3

[0052] Embodiment 3: ZIF-67 film is prepared by polymerization inhibition method

[0053] Weigh 0.484g of cobalt nitrate hexahydrate and ultrasonically disperse in 25mL of anhydrous methanol, and set aside;

[0054] Weigh 0.513g of dimethylimidazole and ultrasonically disperse in 25mL of anhydrous methanol, and add 232μL of triethylamine as a polymerization inhibitor with a pipette gun;

[0055] After mixing the above solutions, stir and react at room temperature for ten minutes;

[0056] The obtained precursor solution was then separated with a centrifuge at a speed of 8000 rpm for 3 minutes, and then dispersed in an ethanol solution to obtain a prepolymer colloidal solution;

[0057] The colloidal solution can be formed into a film by pulling.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a metal organic framework film, which comprises the following steps of: mixing a polymerization inhibitor and a solution of an organic ligand in MOFs (Metal-Organic Frameworks) to form a prepolymer colloid, then adding a solution of metal ions in the MOFs, and stirring and reacting under corresponding synthesis conditions of the MOFs to obtain a prepolymer colloid solution, the polymerization inhibitor is low-boiling-point small organic molecules which have chemical acting force with metal ions or organic ligands in the MOFs; carrying out centrifugal concentration on the reacted prepolymer colloidal solution; coating the concentrated prepolymer colloidal solution on a substrate material; and volatilizing at room temperature to form a film. The method is simple in process, good in applicability and high in controllability, the self-supporting MOFs membrane can be prepared, the MOFs membrane can grow on various substrates, and the prepared MOFs membrane has the advantages of being transparent, continuous and large in size.

Description

technical field [0001] The invention relates to the technical field of preparation of functional membrane materials, in particular to a method for preparing metal-organic framework films and composite films. Background technique [0002] Functional membrane materials are one of the advanced materials that have attracted attention in recent years, showing excellent application prospects in fields such as gas separation, electronic devices, and energy storage. Among numerous porous materials (such as molecular sieves, microporous polymers, covalent organic frameworks, mesoporous silicon, etc.), MOFs are a unique class of porous crystals with organic-inorganic dual components. The MOFs framework is generally assembled by metal nodes and organic ligands through coordination bonds to form a periodic regular channel structure. These structural features endow MOFs with many excellent properties, such as tunable pore size, high specific surface area, and good modification, making t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D71/06B01D69/12B01D67/00
CPCB01D71/06B01D69/12B01D67/0002Y02E10/549
Inventor 霍峰蔚李红峰张伟娜张所瀛
Owner NANJING UNIV OF TECH